This is actionable advice. The action is to create an offer that is not entirely depeneent on a single platform provider. Don't build browser extensions for just a single browser. Don't build an app based business solely around an iOS or Android app - support both platforms. And so on.
This implies that a company could generally survive 50% of their revenue disappearing overnight. This may be true for 1-3 employee companies but past that I doubt it. Also generally the large majority of your revenue still comes from one of your platforms, making that one still likely an existential risk.
